Fix Spec tests

Signed-off-by: Archer <naarcha@amazon.com>

spec/schemas/_common.yaml

@@ -1059,21 +1059,25 @@ components:
         - shards
     WaitForEvents:
       description: Waits until all currently queued events with the given priority are processed. 
-      type: string
-      enum:
-        - high
-        - immediate
-        - languid
-        - low
-        - normal
-        - urgent
-      enumDescriptions:
-        immediate: The highest priority event, processed as soon as possible.
-        urgent: A very high priority event, processed after immediate events.
-        high: A high priority event, processed after urgent events.
-        normal: The default priority for events, processed after high priority events.
-        low: A low priority event, processed after normal events.
-        languid: The lowest priority event, processed after all other events.
+      oneOf:
+        - type: string
+          const: immediate
+          description: Highest priority, processed as soon as possible.
+        - type: string
+          const: urgent
+          description: Very high priority, processed after immediate events.
+        - type: string
+          const: high
+          description: High priority, processed after urgent events.
+        - type: string
+          const: normal
+          description: Default priority, processed after high priority events.
+        - type: string
+          const: low
+          description: Low priority, processed after normal events.
+        - type: string
+          const: languid
+          description: Lowest priority, processed after all other events.
     DataStreamName:
       type: string
     CompletionStats:

spec/schemas/cluster.reroute.yaml

@@ -121,26 +121,34 @@ components:
         - node
         - shard
     Metric:
-      type: string
-      enum:
-        - _all
-        - blocks
-        - cluster_manager_node
-        - master_node
-        - metadata
-        - nodes
-        - routing_nodes
-        - routing_table
-        - version
-      enumDescriptions:
-        _all: Returns all available metrics.
-        blocks: Returns information about cluster level blocks.
-        cluster_manager_node: Returns information about the current cluster manager node.
-        master_node: An alias for `cluster_manager_node`. Deprecated, but maintained for backwards compatibility.
-        metadata: Returns the cluster state metadata
-        nodes: Returns information about nodes in the cluster.
-        routing_nodes: Returns the node-level shard allocations.
-        version: Returns the cluster state version.
+      oneOf:
+        - type: string
+          const: _all
+          description: Returns all available metrics.
+        - type: string
+          const: blocks
+          description: Returns information about cluster-level blocks.
+        - type: string
+          const: cluster_manager_node
+          description: Returns information about the current cluster manager node.
+        - type: string
+          const: master_node
+          description: The alias for `cluster_manager_node`. Deprecated, but maintained for backwards compatibility.
+        - type: string
+          const: metadata
+          description: Returns the cluster state metadata.
+        - type: string
+          const: nodes
+          description: Returns information about nodes in the cluster.
+        - type: string
+          const: routing_nodes
+          description: Returns the node-level shard allocations.
+        - type: string
+          const: routing_table
+          description: Returns index-level shard allocations.
+        - type: string
+          const: version
+          description: Returns the cluster state version.
     RerouteExplanation:
       type: object
       properties: